Improvement in shaft-couplings



UNITED STATES PATENT OFFICE.

JAMES P. COLLINS, OF TROY, NEW YORK.

IMPROVEMENT IN SHAFT-COUPLINGS.

Specification forming part of Letters Patent No. 45,476, dated December20, 1864.

To all whom t may concern.-

Beit known that I, JAMES P. COLLINS, of Troy, in the county ofRensselaer and State of New York, have invented a new and ImprovedShaft-Coupling; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable any personskilled in the art to make and use the same, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure l represents a longitudinal een tral section of my invention,taken in the line mx, Fig. 2; Fig. 2, a transverse section of the saine,taken in the line i/ y, Fig. l, Fig. 3, a longitudinal central sectionof a modification of the same.

Similar letters of reference indicate like parts.

This invention relates to a new and improved coupling for shaiting; andit consists in the employment or use of a divided collar provided withone or more screws or screwthreads and conical surfaces on its exterior,in connection with nuts and female cones or thimbles having conicalinteriors to work on the conical surfaces of the divided collar, allbeing arranged in such a manner that shafting may be securely connectedwith the greatest facility, and also secured together in lineone shaftwith anotherthereby avoiding much trouble hitherto experienced inputting up the shat'ti ng ot' machinery.

A A represent the ends of two shafts; and B, Figs. l and 2, is a collarformed of two equal longitudinal parts, a a, which are fitted on theends of the shafts, but are not allowed to come in close contact witheach other at their sides, a space being allowed to admit of the twoparts, a a, being pressed i'irmly around the shafts to hug the samefirmly. At the center of the collar B there is a screw-thread, b, whichis cut on a cylindrical portion of the collar. The collar at each sideof the screw is of taper or conical form, as shown clearly at c c inFig. 1.

O O represent two nuts, which work on the screw b. These nuts at theirouter parts are provided with an internal or female conical surface, D,which works over the conical parts c c ot' the collar B.

From the above description it will be seen that when the nuts O O arescrewed up on the thread or screw b the internal conical parts D of thenuts which work over the conical surfaces c c of the collar will bind orpress the two parts a a of the latter snugly against the shafts andcause the same to be firmly coupled together in line with each other.

If necessary or desired pins, l d may be driven into one of the parts cof the collar to lit in recesses e in the shafts Aand prevent anylongitudinal play or movement of the latter.

In Fig. 3 a modification of the invention is shown. In this case,instead of having a screw cut centrally on the collar B, a screw, j', iscut on each end of it on cylindrical sur faces, the conical surfacesbeing at the central part of the collar, as shown at g g, and instead ofhaving the female or internal cones at the outer parts of the nuts theyare made detached from the latter and fitted on the conical surfaces g gat the inner sides of the nuts, as shown at lz h. By this arrangement itwill be seen that by screwing up the nuts t' 'i on the screws f thefemale cones h la will be forced toward the center of the collar andmade to press the two parts a a of the same in close contact with theshaft. This modification I consider preferable for couplinglargeshafting, and it possesses the advantage of admitting of the couplingserving as apulley, as it may have an unbroken cylindrical surface thewhole length of the collar.

I claim as new and desire to secure by Letters Patent- A divided collarprovided with one or more screw-threads and two conical surfaces on itsexterior, in connection with nuts and female cones, all arranged to forma new and iinproved coupling for shafting, substantially as set forth.

J. I). COLLINS. Witncsses: l

E. D. NV. Woon, L. D. GAY.

